DCAS Energy Management (DEM) manages the energy accounts and efficiency initiatives for New York City government operations. DEM is responsible for achieving the City's ambitious PlaNYC goal of reducing municipal greenhouse gas (GHG) emissions 30% by 2017.

DEM's mission is to serve as the hub for energy management for City government operations, from energy procurement to reporting and performance tracking, improved operations & maintenance, and building retrofits. DEM's long-term goals are to 1) ensure clean, reliable energy to support City operations, and 2) reduce greenhouse gas emissions of operations.